题目 Investor believes that the mean price of houses in the area is greater than $135,000. A random sample of 25 houses in the area has a mean price of $139,750. The population standard deviation [...]
题目 Whichof the following tests of a hypothesis concerning the population mean is mostappropriate? 选项 A.A z-test if the population variance is unknown and the sample is small B.A z-test if the [...]
题目 Which of the following represents a correct statement about the p-value? 选项 A.The p-value offers less precise information than does the rejection points approach. B.A larger p-value [...]
题目 A hypothesis test for a normally-distributed population at a 0.05 significance level implies a: 选项 A.95% probability of rejecting a true null hypothesis. B.95% probability of a Type I [...]
题目 The weekly closing prices of Mordice Corporation shares are as follows:「huixue_img/importSubject/1564548697533059072.png」The continuously compounded return of Mordice Corporation shares [...]
题目 Homoskedasticity is best described as the situation in which the variance of the residuals of a regression is: 选项 A.zero. B.normally distributed. C.constant across observations. 答案 C [...]
题目 X is a discrete random variable with possible outcomes X = {1,2,3,4}. Three functions f(x), g(x), and h(x) are proposed to describe the probabilities of the outcomes in [...]
题目 Which of the following is a Type I error? 选项 A.Rejecting a true null hypothesis B.Rejecting a false null hypothesis C.Failing to reject a false null hypothesis 答案 A 解析 ： A is [...]
题目 Which of the following statements on p-value is correct? 选项 A.The p-value indicates the\nprobability of making a Type II error. B.The lower the p-value, the weaker\nthe evidence for [...]
题目 If an estimator is consistent, an increase in sample size will increase the: 选项 A.accuracy of estimates. B.efficiency of the estimator. C.unbiasedness of the estimator. 答案 A 解析 ： [...]
